var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');  //转化cookie
var logger = require('morgan');
var ejs = require('ejs');
var indexRouter = require('./routes/index');
var usersRouter = require('./routes/users');
var goodsRouter = require('./routes/goods');
var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
//设置html写，不用jade
app.engine('.html',ejs.__express);
 app.set('view engine', 'html');
// app.set('view engine', 'jade');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

//捕获登陆功能, 也就是拦截
app.use(function(req,res,next){
  if(req.cookies.userId){  //有值则往下走
    next();
  }else{
    //判断原始url
    //方法一：req.originalUrl.indexOf("/goods/list")>-1
    //require里面有一个path，获取pathname的值，/goods与goods/addCart路径不一样
    if(req.originalUrl =='/users/login' || req.originalUrl =='/users/logout'|| req.path=="/goods/list"){
      next();
    }else{
      res.json({
        status:'10001',
        msg:'当前未登陆',
        result:''
      });
    }
  }
})
app.use('/', indexRouter);
app.use('/goods', goodsRouter);
app.use('/users', usersRouter);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;
